i was up around 5,000ft most of the day today and noticed quite a bit of BLUE smoke comin outa the tailpipe. it was only really noticeable when the truck was in park idiling, or low rpm between 5-15mph. it would clear up if i reved the engine but would start back up again when it idled down. it smelled like it was running ritch. iv never noticed it down here at sealevel. anything to worry about?

There is less air as altitude so mixture can go rich if not properly adjusted to inject a bit less fuel. It sounds like "Juice" is not properly adjusting for this. Try a lower power setting on it.

i turned it down to 1 and even 0 when i noticed the smoke, thinking the same thing. no change.

Well it is no cause for serious concern but it is a mixture problem as it is not adjusting properly for altitude. What happen when you remove juice completely?